TS EAMCET · Chemistry · s Block Elements

The alkaline earth metal sulphate, which has its hydration enthalpy greater than its lattice energy is

A ${BeSO}_{4}$
B ${BaSO}_{4}$
C ${CaSO}_{4}$
D ${SrSO}_{4}$

Verified Solution

Answer & Solution

Correct Answer

(A) ${BeSO}_{4}$

Step-by-step Solution

Detailed explanation

The alkaline earth metal sulphate, which has its hydration enthalpy greater than its lattice energy is

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Observe the following data ( $\Delta_i \mathrm{H}_1, \Delta_i \mathrm{H}_2$ and $\Delta_{\text {eg }} \mathrm{H}$ represent the first, second ionisation enthalpies and electron gain enthalpy respectively).

Element	$\begin{gathered}\Delta_i \mathrm{H}_1 \\ \left(\mathrm{~kJ}\mathrm{~mol}^{-1}\right)\end{gathered}$	$\begin{gathered}\Delta_i \mathrm{H}_2 \\ \left(\mathrm{~kJ}\mathrm{~mol}^{-1}\right)\end{gathered}$	$\begin{gathered}\Delta_{\text{eg}}\mathrm{H}\\ \left(\mathrm{kJ}\mathrm{mol}^{-1}\right)\end{gathered}$
I	$520$	$7300$	$-60$
II	$490$	$3051$	$-48$
III	$1681$	$3374$	$-328$
IV	$2372$	$5251$	$+48$

Using the data identify the most reactive metal.

TS EAMCET 2025 Medium

Match the following.

	Column-1 Reaction		Column-2 Main product
A	${SO}_{3} \overset{heavy water}{⟶}$	I	$C_{2} D_{2}$
B	${CaC}_{2} \overset{heavy water (excess)}{⟶}$	II	${CD}_{4}$
C	${Al}_{4} C_{3} \overset{heavy water (large excess)}{⟶}$	III	$D_{2} {SO}_{3}$
		IV	$C_{2} D_{4}$
		V	$D_{2} {SO}_{4}$

The correct match is

TS EAMCET 2021 Hard

Explore more questions on app

From TS EAMCET

Explore more questions on app

Element	\(\begin{gathered}\Delta_i \mathrm{H}_1 \\ \left(\mathrm{~kJ}\mathrm{~mol}^{-1}\right)\end{gathered}\)	\(\begin{gathered}\Delta_i \mathrm{H}_2 \\ \left(\mathrm{~kJ}\mathrm{~mol}^{-1}\right)\end{gathered}\)	\(\begin{gathered}\Delta_{\text{eg}}\mathrm{H}\\ \left(\mathrm{kJ}\mathrm{mol}^{-1}\right)\end{gathered}\)
I	\(520\)	\(7300\)	\(-60\)
II	\(490\)	\(3051\)	\(-48\)
III	\(1681\)	\(3374\)	\(-328\)
IV	\(2372\)	\(5251\)	\(+48\)